function showmenu(id) {
 var list = document.getElementById("list"+id);
 var menu = document.getElementById("menu"+id);
 if (list.style.display=="none") {
  document.getElementById("list"+id).style.display="block";
  menu.className = "title1";
 }else {
  document.getElementById("list"+id).style.display="none";
  menu.className = "title";
 }
};

function highLight(){
};

function unHighLight(){
};

//显示三级目录
function showmenu2(id) {
	 var list = document.getElementById("list"+id);
	 var menu = document.getElementById("menu"+id);
	 if (list.style.display=="none") {
	  document.getElementById("list"+id).style.display="block";
	  menu.className = "title2";
	 }else {
	  document.getElementById("list"+id).style.display="none";
	  menu.className = "title2";
	 }
}
